EP 1348948 A2 20031001 - Transmitted x-ray data acquisition system and x-ray computed tomography system
Title (en)
Transmitted x-ray data acquisition system and x-ray computed tomography system
Title (de)
System zur Datenerfassung von gesendeten Röngenstrahlen und Röntgentomographiesystem
Title (fr)
Système pour l'acquisition des données des rayons x transm s et système de tomographie de rayons x
Publication
Application
Priority
JP 2002088003 A 20020327
Abstract (en)
Transmitted X-ray data is acquired by irradiating X-rays of appropriate doses determined for the portions of a section containing the major axis and the portions thereof containing the minor axis respectively. An X-ray irradiating/detecting device consists mainly of an X-ray irradiator that includes an X-ray tube (20) and irradiates a fan-shaped X-ray beam (400), and an X-ray detector (24) that has a plurality of X-ray detecting elements arrayed in a direction in which the fan-shaped X-ray beam spreads and that is opposed to the X-ray irradiator with an object of imaging (8) between them. The X-ray irradiating/detecting device is rotated (2,4) about the object in order to acquire transmission X-ray data stemming from a plurality of views. At this time, the dose of the X-ray beam is differentiated between predetermined angular ranges of a section of the object shaped like an oval, which extend with the minor axis of the oval section as a centerline, and the other angular ranges. <IMAGE>Transmitted X-ray data is acquired by irradiating X-rays of appropriate doses determined for the portions of a section containing the major axis and the portions thereof containing the minor axis respectively. An X-ray irradiating/detecting device consists mainly of an X-ray irradiator that includes an X-ray tube (20) and irradiates a fan-shaped X-ray beam (400), and an X-ray detector (24) that has a plurality of X-ray detecting elements arrayed in a direction in which the fan-shaped X-ray beam spreads and that is opposed to the X-ray irradiator with an object of imaging (8) between them. The X-ray irradiating/detecting device is rotated (2,4) about the object in order to acquire transmission X-ray data stemming from a plurality of views. At this time, the dose of the X-ray beam is differentiated between predetermined angular ranges of a section of the object shaped like an oval, which extend with the minor axis of the oval section as a centerline, and the other angular ranges. <IMAGE>
IPC 1-7
IPC 8 full level
A61B 6/03 (2006.01); A61B 6/00 (2006.01); A61B 6/02 (2006.01); G01N 23/04 (2006.01); G06T 1/00 (2006.01)
CPC (source: EP US)
G01N 23/046 (2013.01 - EP US); A61B 6/027 (2013.01 - EP US); G01N 2223/419 (2013.01 - EP US)
Citation (examination)
US 5379333 A 19950103 - TOTH THOMAS L [US]
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 1348948 A2 20031001; EP 1348948 A3 20031203; CN 100362965 C 20080123; CN 1446517 A 20031008; JP 2003290214 A 20031014; JP 3864106 B2 20061227; US 2003185343 A1 20031002; US 6987828 B2 20060117
DOCDB simple family (application)
EP 03251939 A 20030327; CN 03108302 A 20030327; JP 2002088003 A 20020327; US 39702603 A 20030325